Heat the oil in a large skillet over medium heat. Place the beef roll in the pan and sear until golden brown on each side. Add the soju and flambe for 2 minutes. Remove the beef with a slotted spoon and set aside. Repeat procedure for the remaining pieces of meat.
SAUCE: Put the apple, pear and strawberry pieces into a blender and puree. Pour puree into a pan and bring to a boil. Reduce heat and simmer. Add a tablespoon of soy sauce and steak sauce. Stir mixture and set aside.
To Plate: Place the beef roll on a heated serving dish, spoon fruit puree over the roll and garnish with rosemary sprigs.